can: dev: add can_is_canfd_skb() API
The CAN device drivers can use can_is_canfd_skb() to check if the frame to send is on CAN FD mode or normal CAN mode. Acked-by: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by: Dong Aisheng <b29396@freescale.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
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@ -99,6 +99,12 @@ inval_skb:
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return 1;
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}
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static inline bool can_is_canfd_skb(const struct sk_buff *skb)
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{
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/* the CAN specific type of skb is identified by its data length */
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return skb->len == CANFD_MTU;
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}
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/* get data length from can_dlc with sanitized can_dlc */
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u8 can_dlc2len(u8 can_dlc);
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